Amine wash: Acid gas & CO₂ removal

Syngas purification and blue hydrogen

When treating syngas, our Amine Wash process (using specialty solvents such as BASF OASE® white) is highly versatile, operating irrespective of pressure levels or initial CO₂ content.

• Extreme Purity: It can achieve CO₂ specifications in the treated gas of < 20 ppm, making it ideal upstream of coldboxes or ammonia processes.
• Energy Transition Ready: It achieves CO₂ capture rates from syngas of more than 99% to produce low-carbon Hydrogen.
• High-Grade CO₂: Because the process has very low co-absorption, it delivers a CO₂ product purity of > 99%.

Flue gas CO₂ capture

For oxygen-containing feedstocks like industrial flue gases with 3% to 25% CO₂, we employ highly stable, second-generation amine solvents such as BASF OASE® blue

This energy-efficient solution reaches CO₂ capture rates of up to 98%, delivering a CO₂ product specification of > 99.9% purity at capture capacities up to 4,000 tonnes per day per train.

Breaking the steam barrier: Decoupling amine carbon capture from site utilities 

Integrating amine-based carbon capture is traditionally challenged by a reliance on low-pressure steam, a utility many industrial sites simply do not have. Air Liquide offers innovative engineering pathways to decouple carbon capture from conventional steam infrastructure, enabling deep decarbonization across diverse and challenging industrial landscapes. We provide a comparative analysis of technologies best suited for specific industries such as cement, pulp and paper, waste to power and steam methane reforming based on their unique energy profiles.

• Alternative steam production: implementation of electric boilers / gas (natural gas, offgases,...) or alternatively (i.e. wood) fired auxiliary boilers with or without additional carbon capture 
• Thermal oil can be more efficient than steam production and additionally offers the option for heat integration with upstream units
• Heat Pumps offer the opportunity to use low grade heat to produce steam or provide a direct heating medium for amine reboiling.

Complex feed gases & taylor made amine washes

Air Liquide addresses the reality of complex flue gas compositions and feed fluctuations over standardized solutions. By prioritizing integration expertise over rigid boundary conditions, Air Liquide shows how to transform site-specific constraints into optimized assets. Our clients profit from a roadmap for implementing robust amine wash systems in low-to-medium CO₂ environments.

• Experienced partnership: With over 35 years of partnership with BASF and over 30 OASE-based amine units designed and built worldwide, Air Liquide is able to build on BASF’s vast know-how of amine chemistry, trace component handling and emission control for OASE-based projects. 
• On-spec product and flue gas to atmosphere: our Amine Washes are built to deal with fluctuating feed gas flows and compositions, ensuring an on-spec CO2 Product and a treated gas with low emissions at all times
• Integration with other Air Liquide technologies, such as eMeOH or CO2 liquefaction offer the opportunity to optimize the overall plant setup as well as enable us to propose overall product guarantees.